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Consider the following statements:
1. The Great Barrier Reef makes up about 10% of the world's coral reef ecosystems.
2. This reef structure is built by billions of tiny organisms, known as coral polyps.
3. The corals and algae have a symbiotic relationship.
Which of the statements given above is/are correct?
  • a)
    1 only
  • b)
    1 and 2 only
  • c)
    2 and 3 only
  • d)
    1, 2 and 3
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Consider the following statements:1. The Great Barrier Reef makes up a...
  • Great Barrier Reef is the world’s most extensive and spectacular Coral Reef ecosystem composed of over 2,900 individual reefs and 900 islands.
    • The Great Barrier Reef makes up about 10% of the world's coral reef ecosystems. Hence, statement 1 is correct.
    • The reef is located in the Coral Sea (North-East Coast), off the coast of Queensland, Australia.
  • This reef structure is composed of and built by billions of tiny organisms, known as coral polyps. Hence, statement 2 is correct.
    • They are made up of genetically identical organisms called polyps, which are tiny, soft-bodied organisms. At their base is a hard, protective limestone skeleton called a calicle, which forms the structure of coral reefs.
    • These polyps have microscopic algae called zooxanthellae living within their tissues. The corals and algae have a mutualistic (symbiotic) relationship. Hence, statement 3 is correct.
  • It was selected as a World Heritage Site in 1981.
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Consider the following statements:1. The Great Barrier Reef makes up about 10% of the worlds coral reef ecosystems.2. This reef structure is built by billions of tiny organisms, known as coral polyps.3. The corals and algae have a symbiotic relationship.Which of the statements given above is/are correct?a)1 onlyb)1 and 2 onlyc)2 and 3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?
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